﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Example67
{
    class SayHello
    {
        public void speak();
        public void goodbye();
    }

    class Program
    {
        static void Main(string[] args)
        {
            SayHello hello = new SayHello();
            hello.speak();
            hello.goodbye();


        }
    }
}
